Both Coca-Cola and Pepsi are altering their recipes to avoid having to label their products with a cancer warning label. The alteration is in response to California adding the chemical 4-methylimidazole (4-MEI) {which is used to give Coke and Pepsi its caramel coloring} to its list of carcinogens (possible cancer causing agent).

The new recipe now in use in California and will be rolled out the rest of U.S. in the near future. At present the new recipes will not be in manufacturing oversees.